Mixer dust cover



FIG. 1 is a front perspective view of a mixer dust cover showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top side view thereof; and,

FIG. 7 is a bottom side view, thereof.

The broken lines depict stitching that forms no part of the claimed design. 

CLAIM The ornamental design for a mixer dust cover, as shown and described. 